Stovepipe.



' n. s. BOWMAN.-

' STOVEPIPE. APPLICATION FILED MAR. l6. [91h Patented Baa-1.3., 191?.

movement meiosis.

Application filed. March 16, 1917. Serial No. 155,274.

To all whom it may concern:

Be it known that I, DILMAN SNYDER Bow- MAN, a subject of the King of Great Britain, residing at Kitchener, in the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Stovepipes, of which the following is a specification.

This invention relates to improvements in stove pipes, and the objects of the invention are to facilitate governing the draft which is supplied to stoves, to permit of the stove pipe being utilized forthe ventilation of the room in which it is placed, and gen erally to adapt the several parts to better perform the functions required of them.

With these and other'objects in view, the invention consists essentially of the improved construction particularly described and set forth in the following specification and accompanying drawings forming part of the same.

In the drawings:

Figure 1 is a side elevation of a length of stove pipe embodying my invention.

Fig. 2 is a vertical section of the same showing the several dampers located therein.

Fig. 3 is an enlarged plan view of my device with the elbow 10 removed Fig. 4 is a perspective view of the dampers.

Like characters of reference refer to like parts in the several figures.

Referring to the drawings, A represents a length of stove pipe provided intermediate of its length with an air inlet or ventilating pipe 10. The pipe A is designed to house a plurality of dampers 11 provided with radially extending slots 12 designed to embrace the vertical rod 13, which is pivotally attached by means of the brackets 14: to the said dampers. In the embodiment illustrated three dampers are shown, and the middle one is provided with a spindle 15 extending diametrically thereacross, and which extends through the walls of the pipe A, to which it is secured by the nut 16.

That end of the spindle remote from the nut 16 is formed with finger grips as shown at 17, and a washer 18 is slidably mounted on the spindleand designed to co-act with the spiral spring 19 located between the said washer and finger grip.

The several dampers are equidistantly spaced and the upper and lower dampers are pivotally supported by the spindles 20 which extend diametrically across the lower face and are pivot-ally supported by the walls of the pipe A, each of the dampers being further provided with a pair of orifices 21 located diametrically opposite each other, but arranged in such a manner that when the dampersare horizontally disposed, that no two orifices will be arranged in alinement. 4

It will be apparent that while there will be suflicient draft through the orifices 21 in the dampers, the cold air entering the fine 10 will mix with the hot air gases and smoke from the stove, to provide an afterburning of the products of combustion. In this way complete combustion is obtained without extra cost of fuel.

The air in the surrounding atmosphere will also be kept in good circulation by means of the ventilating pipe 10, and in fact there will be a constant current of air passing through it to be heated, thus securing an even temperature.

When a stove fitted with this device is in operation, and it is foundnecessary to regulate the drafts, the spindle 15 is rotated through the medium of the finger grip 17 and all the dampers 11 are simultaneously rotated through the medium of the vertical rod 13. i

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention, within the scope of the claim, con structed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings be interpreted as illustrative, and not in a limiting sense.

What I claim as my invention is: V A. new article of manufacture comprising a stove pipe section, a reduced downwardly directed elbow carried by the upper part of the section above its middle line and communicating with the interior of the section I Specificationofiietter s'latent. i Digit). Jill,

7 whereby the cool air from the room is fed 1 perforations o eaeh-- damp'er being-so ar when the dampers are closed, and means for 10 to the pipe, equally spaced pivoted and persimultaneously actuating all the dampers. forated dampers in the section,- one above In witness whereof I have hereunto set the'elboyv -andtwobelow wherqbytheusipg. myhandin thepresence of two witnesses.

hot ases" maybe e r d?beioremi ii a f 1 m I with the oool air and whereby the subse pDILMAN SNYDER BO quent mixture maybe also retarded the said Witnesses:

ELIZABETH WEGENAST,

ranged that they will not be in alinement MAIMIE MUSSELMAN.

cum this patent may be obtained for five cen eech; by addressing the Commissioner of Patents,

' Washington, njc'k 

